Dynamics of particles near the surface of a medium under ultra-strong shocks

Yan Zixiang; Liu Hao; Zhang Xinyu; Ren Guoli; Liu Jie; Kang Wei; Zhang Weiyan; He Xiantu

doi:10.1063/5.0030906

Volume 6 Issue 2

Mar. 2021

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Yan Zixiang, Liu Hao, Zhang Xinyu, Ren Guoli, Liu Jie, Kang Wei, Zhang Weiyan, He Xiantu. Dynamics of particles near the surface of a medium under ultra-strong shocks[J]. Matter and Radiation at Extremes, 2021, 6(2): 026903. doi: 10.1063/5.0030906

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Yan Zixiang, Liu Hao, Zhang Xinyu, Ren Guoli, Liu Jie, Kang Wei, Zhang Weiyan, He Xiantu. Dynamics of particles near the surface of a medium under ultra-strong shocks[J]. Matter and Radiation at Extremes, 2021, 6(2): 026903. doi: 10.1063/5.0030906

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Dynamics of particles near the surface of a medium under ultra-strong shocks

doi: 10.1063/5.0030906

Yan Zixiang¹,
Liu Hao²,
Zhang Xinyu³,
Ren Guoli^4
,,
Liu Jie^{3, 5},
Kang Wei^{3
,
,
,},
Zhang Weiyan^{3, 6},
He Xiantu^{3, 4
,}

1.
HEDPS, Center for Applied Physics and Technology, and School of Physics, Peking University, Beijing 100871, China
2.
Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China
3.
HEDPS, Center for Applied Physics and Technology, and College of Engineering, Peking University, Beijing 100871, China
4.
Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
5.
Graduate School, China Academy of Engineering Physics, Beijing 100193, China
6.
China Academy of Engineering Physics, Mianyang 621900, China

More Information

Corresponding author: a)Author to whom correspondence should be addressed: weikang@pku.edu.cn
Received Date: 2020-09-27
Accepted Date: 2021-02-08

Available Online: 2021-03-01

Publish Date: 2021-03-15

Abstract

Abstract

Through nonequilibrium molecular dynamics simulations, we provide an atomic-scale picture of the dynamics of particles near the surface of a medium under ultra-strong shocks. This shows that the measured surface velocity v_f under ultra-strong shocks is actually the velocity of the critical surface at which the incident probe light is reflected, and v_f has a single-peaked structure. The doubling rule commonly used in the case of relatively weak shocks to determine particle velocity behind the shock front is generally not valid under ultra-strong shocks. After a short period of acceleration, v_f exhibits a long slowly decaying tail, which is not sensitive to the atomic mass of the medium. A scaling law for v_f is also proposed, and this may be used to improve the measurement of particle velocity u in future experiments.

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References(45)

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